1248739 has 4 divisors (see below), whose sum is σ = 1303056. Its totient is φ = 1194424.

The previous prime is 1248721. The next prime is 1248757. The reversal of 1248739 is 9378421.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1248721) and next prime (1248757).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1248739 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1248799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27124 + ... + 27169.

It is an arithmetic number, because the mean of its divisors is an integer number (325764).

2^1248739 is an apocalyptic number.

1248739 is a deficient number, since it is larger than the sum of its proper divisors (54317).

1248739 is an equidigital number, since it uses as much as digits as its factorization.

1248739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54316.

The product of its digits is 12096, while the sum is 34.

The square root of 1248739 is about 1117.4699101094. The cubic root of 1248739 is about 107.6854990855.

The spelling of 1248739 in words is "one million, two hundred forty-eight thousand, seven hundred thirty-nine".